Vitamin K antagonist; it interferes with normal blood clotting; produced when sweet clover spoils. Other names are dicoumarin, dicumol, dufalone, and melitoxin. Active ingredient in warfarin, a rat poison.
An anticoagulant drug used in the treatment of coronary and venous thrombosis. It is administered by mouth and may cause nausea, vomiting, and diarrhea. Dicoumarol has now largely been replaced in clinical use by phendindione or warfarin because it is slow acting, has unpredictable effects, and may produce bleeding from over-dosage.